Luke Chapter 9

5 "And whoever will not receive you, when you go out of that city, shake off the very dust from your feet as a testimony against them."

Why do Jesus let his disciples not to argue with whom do not receive them?

Mat 10:40 "He who receives you receives Me, and he who receives Me receives Him who sent Me.

It is also the same that, whoever does not receive God’s men does not receive God. Not receiving God is the matter between God and that one who does not receive him. But we must remember that vengeance is not on us, and anger does not please God. The word is evil as a sharp sword when it goes out of one’s angry mouth. There will be in the end only that blaspheming against God and not glorifying God. That’s why Jesus wants his disciples just leave peacefully and God will remember all of this.

Rom 12:19 Beloved, do not avenge yourselves, but rather give place to wrath; for it is written, "Vengeance is Mine, I will repay," says the Lord.

Jas 1:20 for the wrath of man does not produce the righteousness of God.

Finally the verses 51-56 in this chapter when Jesus and his disciples met the Samaritans who did not receive them, the disciples instead of forgot the word that Jesus told them and said the arrogant words. It could be an example to warn us to hold the Word of God in mind constantly.